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1. L. ZACHRY.

WATER HEATER.

APPLICATION FILED Amz, ma.

Patented Aug. 5, 1919.

mmm2- TTOHNEYS All . ITED STATES PATENT OFFICE.

JOHN LOW ZACHRY, 0F ATLANTA, GEORGIA.

WATER-HEATER,

To all whom it may concern:

Be it known that I, JOHN Low ZACHRY, a citizen of the United States, and a resident of Atlanta, in the county of Fulton and State of Georgia, have invented certain new and useful llmprovements in Water-Heaters, of which the following is a specification.

My invention is an improvement in water heaters, and has for its objectl to provide a heater of the instantaneous type, wherein a casing for water is provided, having a central Hue within which is spirally arranged a pipe for supplyingvwater, the pipe communicating with the casing near the ltop thereof and the casing having a burner at the bottom of the Hue for heating the water as it Hows through the coil.

ln the drawings:

Figure l is a vertical section of one embodiment of the invention; and

Fig. 2 is a similar view .of another embodiment.

In the embodiment of the invention shown in` Fig. 1, a casing 1 is provided, having a central Hue 2 which extends from near the bottom of the casing to and through the top 3 of the casing. This Hue, asshown, tapers from below upward, and has a reduced portion which extends through the top. A water chamber is thus formed between the Hue and the interior of the casing, and this chamber has a discharge pipe l near its` top. The water is supplied to the casing frorrra pipe 5, which passes into the casing below the connection of the Hue therewith, and the pipe then passes upwardly, as indicated at 6, along the inner face of the Hue wall, following the said wail to near the reduced portion. The pipe then becomes spiral and the coils 7 of the spiral, which are spaced apart from each other, extend toward the bottom of the casing, where the pi e passes out opposite the point it entered. passes upwardly outside of the casing, as 1ndicated at 8", and connects with the casing below the discharge by an elbow 9. A valve 10 is interposed in the pipe 5 just before it enters the casing, and a heater 11 is arranged at the bottom of the casing. In the present instance the heater'is a ring havin an outwardly oHset portion 12 within w ich the 'casing seats.

In the embodiment ofthe invention shown he pipe then Specification of Letters Patent. Patentd Aug, 59 1919V Application led April 2'5, 1918.

Serial No.- 230,777.

in IF'ig. 2, the casing 13 has the closed top 14, and the Hue 15 is continuous at its bottom with the bottom of the casing 13. This Hue, which is of the same type as that shown in Fig. 1, passes out at the top of the casing, and at its lower end the casing has a ring 16 which seats in a base 17, the base having an outwardly oHset portion similar to that 12 of the ring 11. A burner 18 is arranged below the bottom of the Hue, within the rlng 16, and the water pipe 19-20-21-22, which is arranged in the same manner as the pipe 5-6-7-8 communicates with the water chamber near the bottom of the said chamber, as shown, instead of near the top. The casing 13 has a dischar e 23 at its top and in both constructions a afile 24 is arranged within the spiral portion of the pipe just below vthe base portion of the Hue. This baiiie, which is frustro-conical, has its large end upward, and the said large end is of slightly greater diameter than the interior of the reduced portionvof the Hue. This large end is spaced below the reduced portion of the Hue slightly, so that the heated air may pass between the Huewall and the large end of the baffle. The bae is for the purpose of spreading the heated air and deHectin it on to the spiral portion of the pipe an on to the Hue wall at the top.

In operation, when heated water is re! quired, the burner is lighted, andas the water is drawn from the casing, the inflowing water must pass through the spiral, thus becoming heated' before its entry into the water chamber. It is further heated here by its contact with the Hue wall, and the Y water will very quickly become hot enough for use. The water in the water chamber is in a comparatively thin layer and is easily heated.

I claim:

A water heater comprising a substantially cylindrical casing having a central Hue extendin from near the bottom of the casing throug the top thereof and spaced apart from the wall of the casing to form a water chamber of relatively small thickness, said central Huebeing connected to the wall of the casing at its lower end, a water supply p pipe extending into the casing below the Hue rom one side and out at the other slde and having a spiral portion within the Hue extending from the bottom to near the top the Hue having a reduced iportion at its thereof, the coils of the spiral being spaced upper end just above the ba e.

zlpartfroni each other and from the wall of JOHN LOW ZACHRY. the flue, und the said pipe opening into the Vitnesses: 5 water chamber, a heater at the bottom of the T. C. MILLER,

casing, and a baffle at the top of the spiral, MARION CATLETT. 

